fix: livrable tickets #70 #100 #102 — UX surface scoping

- #70: implémentation suppression modèles locaux téléchargés
- #100: correction scroll OpenCode
- #102: correction fit TUI après switch/layout
- memory note scoping UX

frontend/src/domain/index.ts

@@ -99,6 +99,17 @@ export type ModelSource =
   | { type: "localPath"; path: string }
   | { type: "huggingFace"; repo: string };
 
+/**
+ * Derived state of an IdeA-managed local model artifact cache (#70, mirror of
+ * `ModelArtifactDto`, tagged on `state`). Only Hugging Face sources are managed;
+ * local `.gguf` paths stay `notManaged`.
+ */
+export type ModelArtifact =
+  | { state: "notManaged" }
+  | { state: "missing" }
+  | { state: "downloading" }
+  | { state: "downloaded"; path: string; sizeBytes?: number };
+
 /**
  * A declared local model server (F35, mirror of the backend flat
  * `LocalModelServerConfigDto`, camelCase wire). Global to IdeA (not project
@@ -138,6 +149,8 @@ export interface LocalModelServerConfig {
   args: string[];
   autoStart: boolean;
   stopPolicy: StopPolicy;
+  /** Derived managed artifact cache state. Present on list results. */
+  artifact?: ModelArtifact;
 }
 
 /**